CN102764121A

CN102764121A - System and method for inductively communicating data

Info

Publication number: CN102764121A
Application number: CN2011104631979A
Authority: CN
Inventors: C·J·哈迪; 胡国*; R·S·斯托尔蒙特; K·W·罗林; S·B·布卢穆拉
Original assignee: General Electric Co
Current assignee: General Electric Co
Priority date: 2010-12-23
Filing date: 2011-12-23
Publication date: 2012-11-07
Anticipated expiration: 2031-12-23
Also published as: JP6074138B2; US20120161767A1; US8823378B2; CN102764121B; JP2012130700A

Abstract

The invention relates to a system and method for inductively communicating data. A system for inductively communicating signals in a magnetic resonance imaging system is presented. The system in one embodiment includes a first array of primary coils disposed on a patient cradle of the imaging system, and configured to acquire data from a patient positioned on the patient cradle. Additionally, the system includes a second array of secondary coils disposed under the patient cradle, wherein a number of secondary coils is less than or equal to the number of primary coils, wherein the first array of primary coils is configured to inductively communicate the acquired data to the second array of secondary coils.

Description

Be used to respond to the system and method for ground communication data

Technical field

Embodiment of the present disclosure relates to signal communication, and relates more specifically to the inductive communication of signal in the imaging system.

Background technology

In decades recently, the use of nuclear magnetic resonance (MRI) scanning device has obtained fast development.MRI scanning is used for auxiliary diagnosis multiple sclerosis, the cerebral tumor, laceration of ligament, tendinitis, cancer, apoplexy etc. more and more.As will recognize, MRI is a kind of non-intrusion type medical science test, it helps diagnosis and the various medical conditions of treatment.The enhanced contrast between the different soft tissues of health that MRI scanning provides allows the doctor to assess the health various piece better and confirms some waits the disease that other formation method can not fully evaluate with X ray for example, ultrasonic or computer tomography (CT) existence.

The MRI system comprises that typically one or more coils generate magnetic field.In addition, the MRI system also comprises one or more MRI receiver coils, and it is configured to the gyromagnet material detectable signal in the patient.These MRI receiver coil arrays typically must use thick cable.Before scanning imaging system, the use of these thick cables has increased makes receiver coil be in the difficulty on the patient.In addition, the appearance of parallel imaging causes MRI receiver channel quantity to increase.Unfortunately, the increase of this receiver channel quantity has further increased the weight of the problem of the corresponding increase of thick number of cables.

Some current available specification requirements embed the patient below with the subclass of coil in the carriage.Yet each coil is attached to preamplifier, cable and Ba Lun, whole must being contained in the carriage in these.In addition, when scanning the different regions of anatomy, these technology also require to use switch or multiplexer to be connected to the receptor electronic installation with the different subclass with coil.

Some other exemplary teachings must be used microwave or optical link and not use cable to come acquired signal.In these methods, be exaggerated and convert to then light or microwave signal from the signal of each coil, this light or microwave signal are then through in the directive scanner bore of space or the receptor in the inner chamber outside.Before conversion, signal can or can be separated and be transferred to different frequency and/or digitized.Yet these conversion of signals need be placed on adjunct circuit on the coil, and this can increase the quantity of power that coil needs significantly, and cause the heat on coil to generate increase.Adjunct circuit also can increase the weight and volume of coil array, and can interfere radio frequency (RF) field of being surveyed by coil potentially.

In addition, the back array is settled in the fixedly site of some other current available specification requirements below carriage.Although these methods have reduced the quantity of the hardware of coil and association, these methods cause the signal to noise ratio (snr) significantly sacrificing.In addition, some other exemplary teachings use patient bed coupling element (its through inside cable be attached to local imaging coil and induction be coupled in be placed in the lateral substrate coupling element of carriage) and the receiving coil induction is coupled in preceding array.Yet the confined space at the coupling element of big relatively size and place, carriage side has limited the multifunctionality of this method, is difficult to thus use these technology with big array.

Therefore, development can be placed in easily that the patient goes up or the patient below so that overcome the receiver coil array of the light weight of related problem such as cable complexity for example, this will be desirable.In addition, also need reduce the quantity of the hardware of preamplifier in patient's carriage, cable and association.In addition, this minimizing and the SNR of conventional relatively embedded coil that the realizes hardware SNR that do not demote, this is desirable.

Summary of the invention

According to the aspect of present technique, propose to be used for system at magnetic resonance imaging system induction ground signal of communication.This system comprises the first primary coil array, and it is arranged on patient's carriage of imaging system and is configured to gather the patient's data from being placed on patient's carriage.In addition; This system comprises the second subprime coil array; It is arranged on patient's carriage below, and wherein the quantity of secondary coil is less than or equal to the quantity of primary coil, wherein the first primary coil array configurations become with the data induction of being gathered the second subprime coil array of communicating by letter.

According to another aspect of present technique, propose to be used for system at magnetic resonance imaging system induction ground signal of communication.This system comprises the first primary coil array that is arranged on first flexible substrates, its be configured to be arranged on the patient or under and be configured to the patient's acquired signal on the patient's carriage from be placed in imaging system.In addition; This system comprises the second subprime coil array; It is arranged on second flexible substrates with first edge and second edge, and wherein this second flexible substrates is arranged on this first flexible substrates top and makes the subclass of the primary coil at least in secondary coil and this first primary coil array in this second subprime coil array aim at.This system also comprises at least one electric connector that is provided with along one or more edges of this second flexible substrates; Wherein this at least one electric connector is coupled to the secondary coil in the second subprime coil array through being in this second flexible substrates cable inner or that be installed on this second flexible substrates; And wherein this at least one electric connector is configured to be coupled in one or more sides of patient's carriage detachablely, wherein this first primary coil array configurations become with the induction of signal of being gathered this second subprime coil array of communicating by letter.

According to another aspect again of present technique, propose to be used for method at magnetic resonance imaging system induction ground signal of communication.This method comprises the first primary coil array is arranged on the patient's carriage in the imaging system that wherein this first primary coil array configurations becomes from being placed in the patient's acquired signal on patient's carriage.In addition, this method comprises the second subprime coil array is arranged on patient's carriage below.This method comprises also that the patient's carriage that makes in the imaging system advances makes at least one subclass of the primary coil in this first primary coil array during scanning imaging system, be provided with near the secondary coil in this second subprime coil array.In addition, this method comprise with from the induction of signal of this first primary coil array collection this second subprime coil array of communicating by letter.

According to another aspect of present technique, propose to be used for the system of nuclear magnetic resonance.This system comprises the acquisition subsystem that is configured to acquisition of image data; Wherein this acquisition subsystem comprises the subsystem that is used at imaging system induction ground communication data signal; Wherein this subsystem comprises: the first primary coil array; It is arranged on patient's carriage of imaging system, and is configured to from being placed in the patient's acquired signal on patient's carriage; The second subprime coil array, it is arranged on patient's carriage below, wherein the quantity of secondary coil is less than or equal to the quantity of primary coil, wherein this first primary coil array configurations become with the induction of signal of being gathered this second subprime coil array of communicating by letter.In addition, this system comprises related and be configured to handle the processing subsystem of the view data of being gathered in operation with acquisition subsystem.

Description of drawings

When with reference to accompanying drawing (similar sign is represented similar parts in institute's drawings attached) when reading following detailed description, these and further feature, aspect and the advantage of the present invention understanding that will improve, wherein:

Fig. 1 is the block diagram illustration of exemplary imaging system that adopts nuclear magnetic resonance (MRI) system form of the system and method be configured to use Fig. 2-7;

Fig. 2 is the diagram that the aspect according to present technique is used to respond to the system of ground communication data;

Fig. 3 representes according to the equivalent circuit diagram of the system of Fig. 2 of the aspect of present technique;

Fig. 4 is the diagram of another embodiment of system that is used to respond to the ground communication data according to the aspect of present technique;

Fig. 5 is system's coil alignment and the out-of-alignment diagram that the aspect according to present technique is used for responding to the data of ground traffic diagram 2;

Fig. 6 is the diagram of aiming at the subsystem of coil according to the aspect of present technique being used to of in the system of the data of induction ground traffic diagram 2, using; And

Fig. 7 is the flow chart of describing according to the aspect of present technique of exemplary method that is used to respond to the ground communication data.

The specific embodiment

As will be described in more detail below, propose to be used to the various embodiment that respond to the method for ground communication data and be used to respond to the system of ground communication data.Through the method and system that is used to respond to the ground communication data that adopts hereinafter to describe, system dimension and complexity can minimize, and have strengthened the performance of system simultaneously.

Get back to accompanying drawing now and, described the block diagram of the embodiment of MRI imaging system 10 with reference to Fig. 1.This MRI system 10 is illustrated schematically as and comprises scanning device 14, scanning device control circuit 16 and system, control circuit 18.Although this MRI system 10 can comprise any suitable MRI scanning device or detector; In illustrated embodiment; System comprises total body scanner, and this total body scanner comprises that carriage 22 can be arranged to wherein patient 12 is placed on the patient's inner chamber 20 that is used to scan in the position of expectation.Scanning device 14 can be comprise from 0.5 tesla be changed to 3 teslas and outside the scanning device of any suitable field intensity.Use like this paper, term patient is used in reference to the mankind or the animal of the object that is imaging applications.

In addition, scanning device 14 can comprise a series of related coils, is used to produce controlled magnetic field, is used to generate radio frequency (RF) driving pulse and is used in response to the emission of such pulse detection from the gyromagnet material in the patient 12.In the diagrammatic view of Fig. 1, can provide primary magnets coil 24 to be used for generating and the aligned substantially primary magnetic field of patient's inner chamber 20.A series of gradient coils 26,28 and 30 are combined in the coil block, are used for during checking sequence generating the controlled magnetic field gradient, as will be hereinafter in greater detail.RF coil 32 is provided, is used to generate the radio-frequency pulse that is used to encourage the gyromagnet material.In the illustrated embodiment, coil 32 is also as receiving coil in Fig. 1.Therefore, RF coil 32 can be coupled with adopting passive driving and receiving circuit with active mode, is respectively applied for from the gyromagnet material to receive emission and be used to apply the RF driving pulse.The receiving coil of the various configurations of separating with RF coil 32 alternatively, can be provided.Such coil can comprise and specifically be suitable for the structure that target is dissected, head coil assembly for example, or the like.In addition, the receiving coil that adopts any suitable physical configuration can be provided, it comprises phased-array coil, or the like.

In the configuration of expection at present, gradient coil 26,28 and 30 can have the different physical configuration that is suitable for their functions in imaging system 10.As will be by those skilled in the art will recognize that, coil comprise twine or cutting to form call wire, bar or the plate of the loop construction of generation gradient fields when applying like the control impuls described hereinafter.Can adopt some different orders in gradient coil assembly, to place coil.In one embodiment, the z axis circle can be placed in the penetralia site, and can form the similar solenoidal structure that RF magnetic field is had relatively little influence substantially.Therefore in illustrated embodiment, gradient coil 30 is Z solenoid shaft coils, and coil 26 and 28 is respectively Y axle and X axial coil.

The coil of scanning device 14 is controlled magnetic field and the pulse that generates expectation by external circuit, and reads the signal from the gyromagnet material with the mode of control.As will recognize by those skilled in the art, when the material in the tissue that typically is strapped in patient 12 stands primary field, the individual magnetic moment of the paramagnetism nuclear in the tissue with partly aim at.When producing Net magnetic moment on the direction in polarization field, the random orientation component of square in vertical plane cancels each other out substantially.During checking sequence, the RF frequency pulse the Larmor of substances of interest frequency place or near generation, this causes aiming at only square and rotates and produce clean horizontal magnetic moment.This horizontal magnetic moment is around the precession of primary magnetic field direction, thereby the RF signal that is used to rebuild desired images is surveyed and be processed to emission by scanning device 14.

Gradient coil 26,28 configurablely becomes to play the effect in magnetic field that generation typically has the accurate control of anodal and negative pole with 30, and the intensity in this magnetic field changes on predetermined field of view.When each coil was energized with current known, the magnetic field gradient of gained was superimposed upon the linear change that on the primary field and on the Z axle component of the magnetic field intensity of crossing over the visual field, produces expectation.The field is linear change in one direction, but is uniform on two other direction.Three coils have for the mutually perpendicular axis of their change direction, and this can be applied on any direction linear field gradient along with the appropriate combination of these three gradient coils.

Carry out and the various functions of imaging process all-in-one-piece the pulsed gradient field.In these functions some are section selection, frequency coding and phase codes.Can use these functions along X axle, Y axle and the Z axle of initial coordinate system or along other axis of confirming by the pulse current combination that puts on individual field coil.

Section selects gradient to confirm a block organization or anatomical structure to be formed images among the patient 12.Section selects gradient fields can select the RF pulse to apply simultaneously with frequency so that in the spin (spin) with the section underexcitation known volume of the expectation of same frequency precession.Slice thickness is confirmed through the gradient intensity of RF pulse bandwidth and leap visual field.

The frequency coding gradient is also referred to as readout gradient, and on the direction of selecting gradient perpendicular to section, applies usually.Generally speaking, the frequency coding gradient applies before magnetic resonance (MR) echo signal that is produced by the RF excitation forms and during forming.Under the influence of this gradient, the spin of gyromagnet material is carried out frequency coding according to them along the locus of gradient fields.Through Fourier transform, can analyze the signal of collection and confirm their sites in selected section to rely on frequency coding.

At last, phase encoding gradient applies before readout gradient and after the section selection gradient substantially.The gyromagnet material can be realized through the phase change of using slightly different gradient amplitude (it sequentially applies during data acquisition sequence) sequentially to cause the precession proton of material in the location of the spin on the phase-encoding direction.Phase encoding gradient allows among the material spin, to form phase contrast according to their positions on phase-encoding direction.

As will recognize by those skilled in the art, can design that a large amount of versions are used to adopt above-described exemplary gradient pulse function and in the pulse train of this other gradient pulse function of clearly not describing.In addition, can in pulse frequency, make a change so that the suitably directed material of expectation and the MR signal of collection gained of encouraging of section of selecting and frequency and phase code is used for handling.

The coil of scanning device 14 is by magnetic field and the RF pulse of scanning device control circuit 16 controls with the generation expectation.In the diagrammatic view of Fig. 1, thereby scanning device control circuit 16 comprises control circuit 36, and it is used for during checking ordering the pulse train that is adopted and being used to handle the signal that is received.Control circuit 36 can comprise any suitable programmable logic device, the CPU or the digital signal processor of for example general or special-purpose computer.And; Control circuit 36 can further comprise memory circuitry 38; For example be prone to the non-volatile memory device of becoming estranged, be used to be stored in physics and the logic axis configuration parameter that uses during the checking sequence of realizing by scanning device, the view data of checking pulse train description, collection, program routines or the like.

Interface between the coil of control circuit 36 and scanning device 14 is by amplifying and control circuit 40 and transmission and receiving interface circuit 42 are managed.Amplification and control circuit 40 comprise the amplifier for each gradient field coil, are used in response to supplying drive current from the control signal of control circuit 36 to field coil.Transmission/reception (T/R) circuit 42 comprises the additional amplifying circuit that is used to drive RF coil 32.In addition, play at RF coil 32 under the situation of transmitting RF driving pulse and both effects of reception MR signal, T/R circuit 42 typically can comprise switching device, and it is used between active or sending mode and passive or receiving mode, triggering the RF coil.Provide usually by the power supply of 34 indications of the label among Fig. 1, be provided as and be used for energizing to primary magnets 24.At last, scanning device control circuit 16 can comprise the interface unit 44 that is used for system, control circuit 18 exchange configurations and view data.Should be noted that; Although the horizontal circle column type inner chamber imaging system of superconduction primary field magnet assembly is adopted in reference in this description; Present technique can be applicable to various other configurations, for example adopts the scanning device of the perpendicualr field that is generated by the combination of superconducting magnet, permanent magnet, electromagnet or these parts.

System, control circuit 18 can comprise and be used for being convenient to the operator or radiating the device widely that carries out interface between doctor and the scanning device 14 via scanning device control circuit 16.For example, in illustrated embodiment, operator's controller 46 provides with the form of the computer workstation that adopts general or special-purpose computer.Work station typically also comprise be used for that storage inspection pulse train is described, the memory circuitry of inspection agreement, user and patient data, view data (original and handled) etc.In addition, work station can further comprise be used to receive data and with the various interface and the peripheral driver of local and remote-control device swap data.In illustrated embodiment, such device comprises alternative input equipment such as conventional computer keyboard 50 and for example mouse 52.Printer 54 can be provided, and what be used to generate the document rebuild from the data of being gathered and image duplicates output firmly.In addition, computer monitor 48 can be provided, use so that operator interface.In addition, system 10 can comprise various this locality and remote image visit and inspection control device, is represented by the label word 56 among Fig. 1 usually.Such device can comprise image filing and communication system, long-range radiology system etc.

As noted earlier, the MRI receiver coil array typically must use thick cable, and before the initialization scan program, this thick cable makes it be difficult to more the MRI receiver coil array is placed on the patient.According to the application's aspect, propose to be used for the data induction of gathering by the first primary coil array 62 the example system 60 of the second subprime coil array 68 of communicating by letter, it overcomes the shortcoming of current techniques available.The first primary coil array 62 comprises one or more primary coils 64.These primary coils 64 are configured to from being arranged on patient's 12 image data on patient's carriage 66, for example view data.In addition, according to the aspect of present technique, primary coil 64 be configured to the data of being gathered induction other coil of communicating by letter, the secondary coil in the imaging system 10 for example.

According to the aspect of present technique, primary coil 64 is absolute coil or ring.Use like this paper, term " absolute coil or ring " is used in reference to the coil of the cable, preamplifier, multiplexer or the power supply that are not coupled in coil.When elementary coil 64 was not coupled in other parts, the primary coil 64 in first array 62 also can be described as " nothing ties coil ".Therefore, use these independently primary coil 64 without any need for cable primary coil is coupled in other parts.In addition, these primary coils 64 at Larmor frequency place resonance.As will recognize, the Larmor frequency is typically expressed as:

Larmor frequency=γ B _o(1)

Wherein γ is a gyromagnetic ratio, and then is expressed as for typical proton imaging:

γ = 42.58 \frac{MHz}{T} - - - (2)

In addition, B _oExpression magnetostatic field (in tesla (T)).Through example, be 63.87MHz for the Larmor frequency of 1.5T system.Therefore, in the MRI of 1.5T system, the absolute coil of primary coil array or ring will be at about 63.87MHz place resonance.

According to the aspect of present technique, system 60 comprises the first primary coil array 62, and it is arranged in patient's carriage 66 of imaging system.And term patient support, patient's carriage and patient's stand use interchangeably.Through example, imaging system can comprise the MRI system 10 of Fig. 1, and patient's carriage 66 can comprise patient's carriage 22 of Fig. 1.And the first primary coil array 62 comprises for example RF coil 32 MRI receiving coils such as (referring to Fig. 1).

In the configuration of current expection, the first primary coil array 62 embeds in patient's carriage 66.Therefore, the first primary coil array 62 directly embeds in patient's carriage 66 below patient 12.In another embodiment, first primary coil, 62 arrays are arranged on patient's carriage 66.Through example, the first primary coil array 62 can be incorporated in the mat.Then this mat is arranged on patient's carriage 66.And, as noted earlier, these primary coils 64 in the first primary coil array 62 be configured to during the scanning imaging system from for example adopt head forward or foot be orientated the patient who lies on the back 12 image data that are placed on patient's carriage 66 forward.In addition, be arranged on the primary coil 64 in patient's carriage 66 quantity can from about 16 to about 72 scope.Particularly, the primary coil 64 in first coil array 62 is set to make the extended area that primary coil 64 covers patient's carriage 66.

In addition, system 60 comprises second subprime coil array 68.Especially, second subprime coil array 68 comprises that one or more secondary coils 70 are provided with.Secondary coil 70 is configured to receive data from primary coil 64 induction ground.Be to be noted that terminology data and signal use interchangeably.In one embodiment, the secondary coil 70 in second coil array 68 can be arranged in the substrate, and for example support platform 72.These secondary coils 70 also can be described as " monitoring " coil.And the term secondary coil uses with the monitoring coil interchangeably.According to an embodiment, second subprime coil array 68 is placed in the fixed position.Particularly, in one embodiment, second subprime coil array 68 can be placed in the fixed position of patient's carriage 66 belows at the isocenter place of the scanning device 14 (referring to Fig. 1) of imaging system 10.Use like this paper, " isocenter " of term scanning device 14 be used in reference to for lie on the back or prone patient for, at the last/center of (S-I) and L-R dimension down, but before not necessarily meaning/center of back dimension.In addition, in one embodiment, the size of secondary coil 70 is less than the size of primary coil 64.Through example, the size of secondary coil 70 can approximately be 1/4th of primary coil 64 sizes.Yet, should be noted that in certain embodiments, the size of secondary coil 70 can be similar basically with the size of primary coil 64.

And in certain embodiments, the quantity of secondary coil 70 is less than the quantity of primary coil 64 in first primary coil, 62 arrays in the second subprime coil array 68.Particularly, the quantity that typically is different from the primary coil 64 on Z-direction in the quantity of the secondary coil on the Z-direction 70.Yet similar basically with the quantity of primary coil 64 on X-direction in the quantity of the secondary coil on the X-direction 70, this is desirable.Through example, in the illustrated embodiment of Fig. 2, the quantity of the primary coil 70 on Z-direction is 8, and the quantity of primary coil 70 is 3 on X-direction.Therefore, the quantity of the secondary coil 70 on X-direction is 3 to be desirable, can be different from the quantity of the primary coil 70 on equidirectional in the quantity of the secondary coil on the Z-direction.Yet in some other embodiment, the quantity of primary coil 64 can be substantially equal to the quantity of secondary coil 70.In addition, in certain embodiments, secondary coil 70 can be arranged on the distance the scope from about 4mm to about 7cm apart from primary coil 64.

Continuation is with reference to Fig. 2, monitors coil 70 and is coupled in other electronic installation, the treatment circuit of its auxiliary data communication to imaging system 10 that will receive from primary coil 64.Through example, monitor coil 70 and be coupled in preamplifier (not shown among Fig. 2), wherein preamplifier is configured to amplify the signal by in the data of monitoring coil 70 receptions.The output of these preamplifiers is communicated to the receptor in the imaging system 10 for example then.Label 74 ordinary representations are used for secondary coil 70 is coupled in their cables of passage separately.And label 76 ordinary representations are wire harness or the bunchs of cables from the set of the individual body coil of coil 70.

In addition, in one embodiment, the form fit of the shape of second array 68 and first array 62.For example, if the shape of patient's carriage 66 is put down, then the result is that the shape of first array 62 is also put down.It is desirable that the support platform 72 that supports secondary coil 70 so also has similar even shape.Yet if the shape of the shape of patient's carriage 66 and first array 62 therefore is crooked as shown in figure 2, also to have similar curved shape be desirable to support platform 72 so.Use such design to be convenient to make the gap between each primary coil 64 and the secondary coil 70 to keep steady state value, cause thus each primary coil and secondary coil between equal coupling.

As noted above, support platform 72 typically is arranged on the fixed position at scanning device isocenter place.Yet according to another aspect again of present technique, support platform 72 is to be configured in imaging system 10 movably moveable platform (not shown among Fig. 2).This removable support platform 72 also can be arranged on the below of patient's carriage 66.This removable support platform can be monitored the aligning between coil 70 and the primary coil 64 and will describe in more detail with reference to Fig. 5-7 moving on last/lower direction (Z direction) to finely tune.

In one embodiment, second array 68 is placed in first array, 62 belows through removable support platform 72 along guide rail or track (not shown among Fig. 2).The quantity of monitoring coil 70 can be equal to or less than the quantity of primary coil 64, the feasible below that secondary array 68 is placed in the whole or subclass of first array 62.Guide rail or track can be used for hold-in winding and aim at along at least one direction.In illustrated example, be to make that track can be used for moving second array 68 along Z-direction at least for the quantity of first array 62 and second array, 68 both coils on Z-direction.The locking mechanism (not shown among Fig. 2) that in addition, can adopt holding screw for example or pin is monitored coil 70 and is aimed at below each primary coil 64, to make.

In case start scanning imaging system and advance in the imaging system 10 and more specifically advance to patient's inner chamber 20 (referring to Fig. 1) when middle when patient's carriage 66; At any preset time of point, at least one subclass of the primary coil 64 in first array 62 is provided with near the monitoring coil in second array 68 70.In addition, during scanning imaging system, represent the signal of patient 12 anatomical area to gather by primary coil 64.Next, the signal of the being gathered monitoring coil 70 in second array 68 of communicating by letter with being responded to.Particularly, according to the aspect of present technique, the signal of being gathered by the primary coil in first array 62 64 ties primary coil 64 from nothing and is sent to by induction and monitors coil 70 and need not to use any cable.In addition, when patient's carriage 66 advanced to diverse location, the different anatomical area among the patient was aimed at.And the different subclass of primary coil 64 are provided with near monitoring coil 70 now.Gather by primary coil 64 and be communicated to monitoring coil 70 corresponding to the signal in different anatomic district from the subclass induction ground of primary coil 64.In addition, for example amplify by the signal of monitoring coil 70 receptions, and amplifying signal is transferred into the receptor (not shown among Fig. 2) in the imaging system 10 by preamplifier.

It should be appreciated that, during RF transmits, use passive RF blocking network that primary coil 64 was lost efficacy in through each coil in array.This inefficacy of primary coil 64 or detuning help avoid a distortion that transmits, if receiving coil resonance then this distortion takes place during spin excitation.In addition, by the DC pulse, monitor diode in coil 70 and make secondary or monitor coil 70 and lost efficacy through during transmitting, activating as connecting in the design each at normal cable.

Referring now to Fig. 3, described data are sent to primary coil 64 (referring to Fig. 2) induction the diagram 80 of the method for the secondary coil 70 (referring to Fig. 2) in second array 68 (referring to Fig. 2) from first array 62 (referring to Fig. 2).The equivalent electrons circuit of label 82 ordinary representation primary coils 64.Similarly, the equivalent electrons circuit of secondary coil 70 is usually by label 84 expressions.

Like what in Fig. 3, describe, each primary coil 64 in first array 62 has inductance L by comprising ₁With the first capacitor C ₁The circuit of loop represent.Adopt similar mode, each in second array 68 is secondary or monitor coil 70 and have inductance L by comprising ₂With capacitor C ₂With C _2bThe circuit of loop represent.When secondary coil 70 beginning during near primary coil 64, this two coil-induced couplings and show mutual inductance M.In addition, capacitor C _2bWith inducer L _2bBe used for and preamplifier 86 impedance matchings.Monitor coil 70 and be coupled in preamplifier 86, it is coupled in receptor (not shown among Fig. 3) successively via transmission line 88.Transmission line 88 can have coaxial or the strip line geometry.And transmission line 88 can be arranged in the plane of secondary coil 70 or below secondary coil 70, depart from a little.It is to be noted that transmission line 88 is similar basically with the cable 74 of Fig. 2.

In addition, primary coil 64 forms the coupled resonance structure with monitoring coil 70.Primary coil 64 is configured to transmitting RF magnetic flux, and wherein flux can link with the monitoring coil 70 that is provided with near primary coil 64.Particularly, primary coil 64 is monitored the setting of coil 70 a distance so that support enhanced signal transmission in distance.This distance depends on the thickness of patient's carriage 66 and the without hindrance necessary any gap of moving is provided between patient's carriage 66 and scanner structure.Therefore, the signal of being gathered by primary coil 64 is not used cable to hitch primary coil 64 being sent to monitoring coil 70 with responding to.

In addition, PIN diode 87 is used for active transmission obstruction.Transmit impulse duration at RF, DC signal transdiode 87 applies, and this reduces the impedance of diode 87 and allows capacitor C _2bWith inducer L _2bForm the high impedance disable circuit at Larmor frequency place.It is mobile in monitoring coil 70 that this has blocked electric current, transmits pulse induced electric current in primary coil 64 thereby reduce by RF.

In the embodiment of Fig. 2, independent primary coil 64 is arranged in patient's carriage 66, and be configured to the induction of signal of being gathered be sent to the monitoring coil 70 that is arranged on patient's carriage 66 belows.Fig. 4 be used for data from the induction of the first primary coil array 92 be communicated to the diagram 90 of another embodiment of the system of second subprime or listening-in line coil array 96.Among the embodiment that in Fig. 4, describes, this first primary coil array 92 comprises one or more primary coils 94 that are arranged on first flexible substrates.This first flexible substrates can use the dielectric material that for example polyimide film or FR-4 etc. are thin to form.In the configuration of current expection, this first flexible substrates is to come patterning with the vest form.This vest 92 of primary coil 94 can be dressed by patient 12.In addition, primary coil 94 comprise by be tuned to the absolute coil of Larmor frequency.Therefore, primary coil 94 does not have cable coupled with it, preamplifier or switch.

The top image data that the vest 92 of primary coil 94 allows from patient 12.According to the other aspect of present technique, first flexible substrates 92 with primary coil 94 can be based on the patient of just being scanned 12 position and patterning.For example, if the bottom of scan patients 12 is desirable, then first flexible substrates 92 can adopt form and the patterning of the trousers of being dressed by patient 12.Therefore trousers with primary coil 94 help the bottom image data from patient 12.In addition, if the head of scan patients 12 is desirable, first flexible substrates 92 that then has primary coil 94 can be used as the helmet form of being dressed by patient 12 and comes molding.Although the embodiment of Fig. 4 is depicted as the vest that comprises primary coil 94 with first array 92, it is to be noted that first array 92 can be based on just being come patterning by the position of scan patients 12 with difformity.

In addition, system 90 comprises second subprime coil array 96.In the embodiment of Fig. 4, second array 96 comprises the secondary coil that is arranged on second flexible substrates or monitors coil 98.This second flexible substrates can be formed by the dielectric material that for example polyimide film or FR-4 etc. are thin.In addition, in one embodiment, the form molding that this second flexible substrates can blanket.In addition, this blanket 96 of monitoring coil 98 is fixed to the side of patient's carriage 66.In one embodiment, this blanket 96 uses at least one electric connector 100 and is fixed to the side of patient's carriage 66.In certain embodiments, can adopt and to match the system connector (not shown among Fig. 4) that is coupled in electric connector 100 and is provided with electric connector 100 operatively is connected to patient's carriage 66 near patient's carriage 66.Electric connector 100 is coupled on the monitoring coil 98 in the blanket 96 through being in blanket 96 inner cables (not shown among Fig. 4) usually.Yet in some other embodiment, electric connector 100 can be coupled in the monitoring coil 98 in the blanket 96 through the cable (not shown among Fig. 4) that is installed on the blanket 96.In addition, blanket 96 can be wrapped on patient's vest 92.Especially, blanket 96 is wrapped in the primary coil 94 that makes on the vest 92 in the vest 92 and aims at the monitoring coil 98 in the blanket 96.

In addition, the blanket of monitoring coil 96 can be fastened to the vest of primary coil 92.For this reason, in certain embodiments, first securing member (not shown among Fig. 4) is arranged on the blanket of monitoring coil 96.And second securing member (not shown among Fig. 4) is arranged on the vest of primary coil 92.In one embodiment, this first securing member can be hook strip and endless belt, for example VELCRO with this second securing member.Alternatively, nonmetal, fastener button can be used as securing member.First securing member of monitoring on the blanket of coil 96 is used for blanket 96 is fixed to second securing member on primary coil 96 vests, guarantees that thus primary coil 94 is aimed at rightly in monitoring coil 98 and the vest 92 in the blanket 96.The signal of being gathered by the primary coil in the vest 92 94 is communicated to the monitoring coil 98 the blanket 96 from primary coil 94 then with responding to.Signal is sent to preamplifier and the receptor in the imaging system subsequently.

Be pointed out that further the primary coil 94 in being arranged on vest 92, primary coil also can embed in the carriage 66 to allow a plurality of imaging applications.In addition, except the blanket 96 of monitoring coil 70, monitor coil and also can be arranged on carriage 66 belows.

In certain embodiments, the additional blanket (not shown among Fig. 4) of the monitoring coil similar with the blanket of secondary coil 96 can be fixed to the opposite side of patient's carriage 66.This blanket is similarly aimed at at least a portion of primary coil 94 in the vest 92.

In addition, during scanning imaging system, in the time of in patient's carriage advances entering magnet inner chamber, the different subclass of the primary coil in first coil array are provided with near the monitoring coil in second coil array.Yet in some situation, the subclass of primary coil can be aimed at monitoring coil exactly, causes thus being sent to the signal to noise ratio reduction in the data of monitoring coil by primary coil collection and induction ground.Therefore, the subclass of guaranteeing primary coil with monitor coil and aim at desirable exactly.

Fig. 5 is the diagram 110 of the primary coil and the aligning 112 of the expectation of monitoring coil.In Fig. 5, also described the misalignment 114 of primary coil with the non-expectation of monitoring coil.In certain embodiments, the subclass of primary coil is aimed at the subclass that makes primary coil and must be aimed at monitoring coil center heart with the expectation of monitoring coil.For this reason, in one embodiment, discern " labelling " based on the patient of just being scanned 12 anatomical area.In case moving into patient's inner chamber, startup scanning imaging system, patient's carriage make the labelling of being discerned be positioned in the isocenter place of scanning device.As pointing out the front that the default location of monitoring coil typically also is the isocenter of scanning device.

Label 116 ordinary representations are in the position of the primary coil 118 in the magnet inner chamber 20 equimagnetic intracoelomic cavities outside of for example Fig. 1, and the labelling of in patient's anatomical area, selecting is represented by label 120.It is to be noted that primary coil 118 is placed so that the labelling of being discerned 120 is positioned at isocenter 126 places of scanning device.In addition, monitoring coil 124 is placed in the fixed position around the isocenter 126 of scanning device.Alternatively, in one embodiment, monitoring coil 124 can be installed on the moveable platform.

In addition, the subclass of label 122 ordinary representation primary coils 118 is aimed at the expectation of monitoring coil 124.As pointing out the front, monitor the size of the size of coil 124 in this example less than primary coil 118.Therefore, be desirable with the center of less monitoring coil 124 and the centrally aligned of primary coil 118, described like label 122.

In addition, in the time of in patient's carriage advances entering magnet inner chamber,, between primary coil 118 and monitoring coil 124, can there be the misalignment of non-expectation based on the labelling of being discerned 120.This misalignment is represented by label 130 usually.Label 128 is the position of the primary coil 118 in the indication magnet inner chamber outside usually.

Therefore, existence needs the subclass of tuning primary coil 118 and aiming at of monitoring coil 124.According to the aspect of present technique, propose to be used to make the subclass and monitoring correctly aligned subsystem of coil 124 and method of primary coil 118.Fig. 6 combines the system that is used to respond to the ground communication data of Fig. 1 to use, be used for subclass and the diagram diagram 140 of monitoring the aligned subsystem of coil with primary coil.Especially, in the embodiment of Fig. 6, primary coil 118 is arranged on first side 142 of patient's carriage 66, and monitors second side, 144 belows that coil 124 is arranged on patient's carriage 66.And among the embodiment that in Fig. 6, describes, being used to make the subclass of primary coil 118 is optical registration subsystems with monitoring the correctly aligned system 140 of coil 124.According to the aspect of present technique, this alignment subsystem comprises non-metal optical reflector 146, light source 148 and photo-detector 150.Therefore, in one embodiment, non-metal optical reflector 146 is arranged on each primary coil 118 below.In the configuration of current expection, non-metal optical reflector 146 is related with primary coil 118.Especially, in one embodiment, non-metal optical reflector 146 is in primary coil 118 centered beneath of correspondence.Through example,, then non-metal optical reflector 146 is arranged on second side 144 of patient's carriage 66 if primary coil 118 is arranged on first side 142 of patient's carriage 66 or embeds in patient's carriage 66.Non-metal optical reflector 146 is configured to the beam reflection from light source 148.

In some other embodiment, non-metal optical reflector 146 also can only be placed in primary coil below of row of every left and right directions of coil.Especially, in one embodiment, non-metal optical reflector 146 is placed in the center of the row that is positioned at left and right directions or primary coil 118 belows that are provided with near this center.In addition, in this embodiment, in whole array, the row of each left and right directions has corresponding non-metal optical reflector 146, and therefore this formed non-metal optical reflector 146 row that occupy each primary coil 118 center on the S/I direction.Because aiming at is on the S/I direction, this can be enough to comprise the non-metal optical reflector 146 across the S/I direction.

In addition, light source 148 is related with each monitoring coil 124.Particularly, light source 148 is arranged on each monitoring coil 124 and makes light source 148 be directed toward second side 144 of patient's carriage 66.In addition, photo-detector 150 is related with each monitoring coil 124.In one embodiment, photo-detector 150 also is arranged on each monitoring coil 124.Photo-detector 150 is configured to survey the light from 146 reflections of non-metal optical reflector.The example of low power sources 148 comprises LED (light emitting diode) or VCSEL (vertical cavity surface emitting laser).And the example of photo-detector 150 is to be selected such that photo-detector 150 has highly sensitive photodiode in the wave-length coverage of light source 148.Describe with reference to primary coil 118 like the front, light source/detector is to monitoring on the coil corresponding to of row that the primary coil with non-metal optical reflector only is placed in every left and right directions.

Light transmits and is directed toward non-metal optical reflector 146 from light source 148.If light source/detector pair non-metal optical reflectors 146 below being arranged on primary coil 118 are aimed at exactly, then light is reflected by non-metal optical reflector 146 and is surveyed by photo-detector 150.Yet, do not aim at exactly if monitor coil 124 with primary coil 118, do not survey by 146 reflections of non-metal optical reflector and by photo-detector 150 effectively from the light that light source 148 transmits.

The misalignment of therefore, proofreading and correct between primary coil 118 and the monitoring coil 124 is desirable.Especially, in one embodiment, be installed in monitoring coil 124 on the moveable platform can be on+Z direction with the stride translation of little increment.At each stride, light is transmitted towards non-metal optical reflector 146 by light source 148.If the optical signal of being measured by the output of photo-detector 150 that is received increases, the moveable platform that then has a setting monitoring coil 124 on it is translation on+Z direction further, begins to reduce up to the output of photo-detector 150.Subsequently, have the moveable platform of monitoring coil 124 and be placed in site now so that monitor coil 124 corresponding to the output of photo-detector 150 peak values by translation.The peak value output of photo-detector 150 is aimed at corresponding to the primary coil 118 and the center heart of monitoring coil 124.

Yet; If when having the moveable platform of monitoring coil 124 along+Z-direction translation; Do not increase by the measured output signal that is received of the output of photo-detector 150, then monitor coil 124 translation on-Z direction and begin to reduce up to the output of photo-detector 150.Subsequently, monitor coil 124 and be arranged on site now so that monitor coil 124, aim at corresponding to the primary coil 118 and the center heart of monitoring coil 124 in the peak value output of this place's photo-detector 150 corresponding to the output of photo-detector 150 peak values by translation.Follow above-described program, patient's carriage 66 advances when getting in the magnet inner chamber 20 during scanning imaging system, and the expectation image space place that the center heart between primary coil 118 and the monitoring coil 124 is aligned in patient's carriage 66 realizes.

According to the other aspect of present technique, the optical registration subsystem of alternate figures 6 uses the prescan signal to help accurately to aim at primary coil 118 and monitoring coil 124.Especially, the prescan signal is monitored when monitoring coil 124 with the stride translation of less increment.The corresponding data of monitoring coil 124 positions (its corresponding peak signal) are used for imaging.

In addition, according to some aspects of present technique, a kind of exemplary method that is used for signal is communicated to from independent primary coil with responding to the monitoring coil is proposed.Get back to Fig. 7 now, described diagram flow process Figure 160 of exemplary method that is used to respond to the ground signal of communication according to the aspect of present technique.This method begins at step 162 place, and the first primary coil array wherein is provided.In one embodiment, primary coil embeds in patient's carriage or is provided with above that.Through example, first array 62 (referring to Fig. 2) of primary coil 64 (referring to Fig. 2) embeds among patient's carriage 66 (referring to Fig. 2).Alternatively, primary coil 94 (referring to Fig. 4) is arranged on (referring to Fig. 4) in the vest 92.Subsequently, like step 164 indication, the second listening-in line coil array is provided.For example, in one embodiment, the monitoring coil 70 (referring to Fig. 2) of second array 68 (referring to Fig. 2) is arranged on the isocenter place of the scanning device of patient's carriage 66 belows.Yet, in some other embodiment, to monitor coil 98 (referring to Fig. 4) and be arranged on (referring to Fig. 4) in the blanket 96, this blanket 96 is configured to be arranged on vest 92 tops.

In addition, the patient, for example patient 12 (referring to Fig. 1) can be placed on patient's carriage 66.During scanning imaging system, gather then corresponding to patient's data.For this reason, patient's carriage can advance in the imaging system (referring to Fig. 1) to help the image data from the patient, like what indicated by step 166.During scanning imaging system, the patient's carriage 66 with setting patient 12 on it gets among patient's inner chamber 20 (referring to Fig. 1).Especially, patient's carriage at least one subclass that makes the primary coil in the coil array of winning of advancing is settled near the monitoring coil in second array.Subsequently, patient's carriage advances to diverse location, aims at the different anatomic district among the patient thus.Because moving of patient's carriage, the different subclass of primary coil are near monitoring the coil setting.

As noted above, when patient's carriage advanced in the magnet inner chamber, the different subclass of the primary coil in first coil array were settled near the monitoring coil in second coil array.Yet in some cases, the subclass of primary coil can not aimed at monitoring coil exactly, causes the signal to noise ratio of the data of being gathered to reduce thus.Therefore, examine the subclass of primary coil and whether aim at (as indicated by step 168) exactly with monitoring coil, this is desirable.In certain embodiments, the subclass of primary coil is aimed at monitoring coil center heart with the aligned subclass that must guarantee primary coil of examining of monitoring coil.

And, in step 168, do not aim at exactly with monitoring coil if examine the subclass of primary coil, it is desirable then proofreading and correct the subclass of primary coil and the misalignment between the monitoring coil.Therefore, in step 170, the subclass of primary coil is aimed at the monitoring coil exactly.In one embodiment, the method for using the front to describe with reference to Fig. 5-6 makes primary coil and monitors coil alignment.

According to the exemplary aspect of present technique, during scanning imaging system,, come acquired signal by the subclass of primary coil in the position of given patient's carriage.The signal of being gathered is sent to the monitoring coil then with responding to.Can as described in the front, for example amplify and be transferred into receptor by monitoring signal that coil receives, like what describe by step 172 by preamplifier.In addition, when patient's carriage advances to diverse location, aiming patient's different anatomic district.Because moving of patient's carriage, the different subclass of primary coil are near monitoring the coil setting.The signal of being gathered at all places place of patient's carriage by the subclass of primary coil is communicated to the monitoring coil with being responded to.Monitor coil and then the signal that is received is sent to the treatment circuit that can comprise preamplifier.Output with treatment circuit is sent to receptor then.

Again with reference to decision block 168, if examine the subclass and monitoring coil alignment of primary coil, then control forwards step 172 to, wherein is communicated to the monitoring coil by the signal that the subclass of primary coil is gathered with being responded to.As pointing out the front, monitor coil and then the signal that is received is sent to the treatment circuit that can comprise preamplifier.Output with treatment circuit is sent to receptor then.

As noted above, the subclass of primary coil is aimed at monitoring coil center heart with the aligned subclass that must guarantee primary coil of examining of monitoring coil.For this reason, in one embodiment, discern " labelling " based on the patient of just being scanned 12 anatomical area.In case moving into patient's inner chamber, startup scanning imaging system, patient's carriage make the labelling of being discerned be placed in the isocenter place of scanning device.As pointing out the front that the default location of monitoring coil typically also is the isocenter of scanning device.

In addition, the example of front, demonstration and treatment step (those that for example can be carried out by imaging system 10 etc.) can be realized based on the appropriate codes in the system of processor by for example general or special-purpose computer etc.The difference that should be noted also that present technique realize can be with different order or basically simultaneously (promptly parallel) carry out in step described herein some or all.In addition, function can adopt the various programming languages that include but are not limited to: C++ or Java to realize.Such code can be stored in or be suitable for being stored on one or more tangible, machine readable medias, for example is stored in and can be visited by the system based on processor on data storage chip, Local or Remote hard disk, CD (being CD or DVD), memorizer or other medium of carrying out the code of being stored.It is to be noted that tangible medium can comprise paper or another suitable medium of print command above that.For example, can come electron capture instruction via photoscanning paper or other medium, then with the suitable method compiling, explain or processing instruction (if being necessary) otherwise, and then with instruction storage in data storage bank or memorizer.

The above-described various embodiment that are used to the method for communication MRI signal with responding to and are used to respond to the system of ground signal of communication have strengthened the performance of imaging system significantly.Especially, be used for that signal is communicated to the coupled use of induction of monitoring coil from independent primary coil with responding to and avoided using active component on the coil or near the coil, overcome needs thus to active component supply electric power.Particularly, the needs to the preamplifier on the coil, blender or analog-digital converter (ADC) have also been eliminated in the above-described design that is used to respond to the system of ground signal of communication.Therefore; This design allow to use the relatively little listening-in line coil array that is provided with around the scanning device isocenter to receive signals with the different subclass from primary coil, and this depends on when patient's carriage advances it is the isocenter place which subclass of primary coil is arranged on scanning device.

In addition, adopt the light weight primary coil array of vest form to increase patient's the comfort level and the handling capacity of scanning device greatly.In addition, also be minimized or eliminate, reduce a large amount of heat that dissipates by thick cable Ba Lun thus for the needs of the thick cable Ba Lun that is used for blocking the cable common mode current.In addition, the quantity of preamplifier, cable, Ba Lun and the switch in the minimizing patient carriage has also reduced the cost and the complexity of imaging system.

Although this paper only illustrates and describe some characteristic of the present invention, those skilled in that art will expect many modifications and change.Therefore, be appreciated that the claim of enclosing is intended to contain all such modification and changes, they fall in the true spirit of the present invention.

The element tabulation

The 10:MRI imaging system

12: the patient

14: scanning device

16: the scanning device control circuit

18: system, control circuit

20: patient's inner chamber

22: patient's carriage

24: the primary magnets coil

26-30: gradient coil

32: radio-frequency coil

34: power supply

36: control circuit

38: memory circuitry

40: amplify and control circuit

42: transmission/receiving interface circuit

44: interface unit

46: operator's controller

48: monitor

50: keyboard

52: mouse

54: printer

56: local and remote image visit and inspection control device

60: the system that is used to respond to the ground communication data

62: the first independent primary coil arrays

64: primary coil

66: patient's carriage

68: the second subprime coil array

70: secondary coil

72: substrate

74: cable

76: bunch of cables

80: the pictorial representation of equivalent circuit that is used to respond to the system of ground communication data

82: the equivalent circuit of primary coil

84: the equivalent circuit of monitoring coil

86: preamplifier

87: diode

88: transmission line

90: the system that is used to respond to the ground communication data

92: the vest of primary coil

94: primary coil

96: the blanket of monitoring coil

98: monitor coil

100: adapter

110: primary coil and aligning and the out-of-alignment diagram of monitoring coil

112: the aligning of expectation

114: the aligning of non-expectation

116: the primary coil in the inner chamber outside

118: primary coil

120: labelling

122: the inboard aligning of monitoring coil and primary coil of inner chamber

124: monitor coil

126: the scanning device isocenter

128: the primary coil in the inner chamber outside

130: the inboard misalignment of monitoring coil and primary coil of inner chamber

140: be used to use optics to make primary coil and the aligned system of monitoring coil

142: first side of patient's carriage

144: second side of patient's carriage

146: the non-metal optical reflector

148: light source

150: photo-detector

160: diagram is used to respond to the flow chart of the method for ground communication data

162-172: the step that is used to carry out the method that is used to respond to the ground communication data

Claims

1. system (60) that is used at magnetic resonance imaging system (10) induction ground signal of communication, said system (60) comprising:

First primary coil (64) array (62), it is arranged on patient's carriage (66) of said imaging system (10), and is configured to from being placed in patient (12) image data on said patient's carriage (66); And

Second subprime coil (70) array (68), it is arranged on said patient's carriage (66) below, and the quantity of wherein said secondary coil (70) is less than or equal to the quantity of said primary coil (64),

Wherein said first primary coil (64) array (62) is configured to the data of being gathered are communicated to said second subprime coil (70) array (68) with responding to.

2. the system of claim 1 (60); Wherein said first primary coil (64) array (62) comprises absolute coil; Said primary coil (64) in wherein said first primary coil (64) array (62) is not coupled in cable, preamplifier, multiplexer or power supply, and wherein said first primary coil (64) array (62) embeds in said patient's carriage (66) or is arranged on the top of said patient's carriage (66).

3. the system of claim 1 (60); It further comprises alignment subsystem (140); This alignment subsystem (140) is configured to help to make at least one subclass of the primary coil (64) in said second subprime coil (70) array (68) and said first primary coil (64) array (62) to aim at, and wherein said alignment subsystem (140) comprising:

Non-metal optical reflector (146); It is related with the one or more primary coils (64) in said first primary coil (64) array (62), primary coil (64) centered beneath of wherein said non-metal optical reflector (146) on said patient's carriage (66) second sides;

Light source (148), it is related with the one or more secondary coils (70) in said second subprime coil (70) array (68), and wherein said light source (148) is configured to the light beam guiding towards said non-metal optical reflector (146); And

Photo-detector (150), it is related with the one or more secondary coils (68) in said second subprime coil (70) array (68), and wherein said photo-detector (150) is configured to survey by non-metal optical reflector (146) beam reflected.

4. system (90) that is used at magnetic resonance imaging system (10) induction ground signal of communication, said system comprises:

Be arranged on first primary coil (94) array (92) on first flexible substrates, it is configured to be arranged on, and patient (12) goes up or its below and be configured to said patient (12) acquired signal on the patient's carriage (66) from be placed in said imaging system (10);

Second subprime coil (98) array (96); It is arranged on second flexible substrates with first edge and second edge, and wherein said second flexible substrates is arranged on said first flexible substrates top makes at least one subclass of the primary coil (94) in secondary coil (98) and said first primary coil (94) array (92) in said second subprime coil (98) array (96) aim at; And

At least one electric connector (100); It is along one or more edges setting of said second flexible substrates; Wherein said at least one electric connector (100) is coupled in the secondary coil (98) in said second subprime coil (98) array (96) through being in said second flexible substrates cable inner or that be installed on said second flexible substrates; And wherein said at least one electric connector (100) is configured to be coupled in removedly a side or many sides of said patient's carriage (66)

Wherein said first primary coil (94) array (92) be configured to the induction of signal of being gathered be communicated to said second subprime coil (98) array (96).

5. system as claimed in claim 4 (90), it further comprises:

Be arranged on first securing member on said first flexible substrates, wherein said first securing member comprises hook strip and endless belt or nonmetal fastener button; And

Be arranged on second securing member on said second flexible substrates; Wherein said first securing member becomes said first primary coil (94) array (92) that will be arranged on said first flexible substrates operatively to be fastened to the secondary coil (98) that is arranged on said second flexible substrates with said second fastener arrangement, and wherein said second securing member comprises hook strip and endless belt or nonmetal fastener button.

6. method that is used at magnetic resonance imaging system induction ground signal of communication, said method comprises:

The first primary coil array is arranged on the patient's carriage in the said imaging system, and the wherein said first primary coil array configurations becomes from being placed in the patient's acquired signal on said patient's carriage;

The second array secondary coil is arranged on said patient's carriage below;

At least one subclass that said patient's carriage is advanced make the primary coil in the said first primary coil array in said imaging system during scanning imaging system near the secondary coil setting in the said second subprime coil array; And

Will by the induction of signal of the said first primary coil array collection be communicated to said second subprime coil array.

7. method as claimed in claim 6; It further comprises when said patient's carriage advances in said imaging system; Examine this subclass of the primary coil in secondary coil and the said first primary coil array in the said second subprime coil array and aim at, said at least one subclass of said second subprime coil array and primary coil is aimed at comprise:

Based on the anatomical area identification marking among the said patient of just being scanned;

Said patient's carriage is set makes the labelling of being discerned be placed in the isocenter place of said imaging system;

Examine said second subprime coil array and aim at, wherein examine said second subprime coil array and aim at said at least one subclass center heart of primary coil and comprise with this at least one subclass center heart of the first primary coil array:

At least one primary coil with in the said first primary coil array disposes the non-metal optical reflector, wherein said non-metal optical reflector this at least one primary coil centered beneath on said patient's carriage second side;

The related light source of at least one secondary coil in configuration and the said second subprime coil array, wherein said light source is configured to light beam is guided towards said non-metal optical reflector; And

The configuration with said second subprime coil array in the related photo-detector of at least one secondary coil, wherein said photo-detector is configured to survey the light beam by said non-metal optical reflector reflects.

8. method as claimed in claim 7, wherein examine said second subprime coil array and aim at this at least one subclass center heart of primary coil and comprise:

The said second subprime coil array of translation on first direction;

To guide by the light beam that said light source generates towards said non-metal optical reflector;

Supervision by said non-metal optical reflector reflects by said photo-detector signals detected; And

Based on the reflected signal of being surveyed by said photo-detector, the said second subprime coil array of translation is aimed at said at least one subclass of the primary coil in said second subprime coil array and the said first primary coil array on said first direction or the second direction opposite with said first direction.

9. method as claimed in claim 8, wherein examine said second subprime coil array and aim at said at least one subclass center heart of primary coil and comprise:

When said second subprime coil array during translation, is kept watch on the prescan signal on first direction; And

Confirm position corresponding to the peaked said second subprime coil array of said prescan signal.

10. system that is used for nuclear magnetic resonance, it comprises:

Acquisition subsystem, it is configured to acquisition of image data, and wherein said acquisition subsystem comprises:

Be used for the subsystem at said imaging system induction ground communication data signal, said subsystem comprises:

The first primary coil array, it is arranged on patient's carriage of said imaging system, and is configured to from being placed in the patient's acquired signal on said patient's carriage;

The second subprime coil array, it is arranged on said patient's carriage below, and wherein the quantity of secondary coil is less than or equal to the quantity of primary coil,

The wherein said first primary coil array configurations become with the induction of signal of being gathered be communicated to said second subprime coil array; And

Processing subsystem, it is related with said acquisition subsystem and be configured to handle the view data of being gathered in operation.